07-31-2011, 08:50 PM
I got 10 of the CP 25 round mags and they all work fine. I also have 4 of the 17 rounders, but mine are marked "6.8" (I assume either they're the same magazine, or the messed up the order), They work great, nonetheless. I also have a few 10 rounders that only hold 9 rounds but work fine. The only problem I had with my AR feeding was before I cut m4 ramps into the upper. That fixed everything. It's simple, wider case means the tip of the bullet is lower in the magazine, so your feed ramp needs to start lower.